A metal 'A' reacts with dilute HCl to give metal salt and a gas 'B'. Identify gas is 'B'.

Cl₂

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N₂

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H₂

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O₂

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Solution

The correct option is C
H₂

Metals react with dilute acids to form salts and the hydrogen gas is evolved.

The reaction is given as:

2Na + 2HCl → 2NaCl + H₂

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